Way back when: People used screensavers to prevent "burn-in" on CRT monitors, where static images could permanently damage the screen. Screensavers like 3D Pipes animated the display during inactivity ...
In the past, Windows screensavers included '3D pipes' where pipes grow and grow, '3D flying objects' where objects fly around the screen, '3D mazes' where maze spaces expand, and '3D text' where a ...